Nanofocusing Device (IMAGE) California Institute of Technology Caption This is a scanning-electron-microscope image of the nanofocusing device. Credit Caltech/Hyuck Choo and Myung-Ki Kim Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.